Hello Anton,
It would be a good idea to see a local doctor about this. It is unlikely to be related to the medication and should be considered on the basis of being a 40-50-60 year old man? who has had some dizziness and dash (fast?) heartbeat.
The medications only treat Hep C. They do not provide any protection from all the other diseases that impact people so you should talk to a doctor about the dizzy feeling and fast heartbeat. There is a condition called atrial fibrillation that becomes increasingly common with age. This can produce dizziness and a fast irregular heartbeat.
Please make the time to see a local doctor and explain what you have noticed to him.